Shaper attachment



March 13, 1951 J. R. TACKETT ETAL 2,545,393

SHAPER ATTACHMENT Filed June 12, 1945 2 Sheets-Sheet 2 INVENTOR. JAMES R. TACKE r 7' VAL a. E M4 N5 BY mwwf.

ATTD R N EYS Patented -Mar. 13, 1951 oFrlcs 2,545,393 SHAPER ATTACHMENT James R. Tackett and Val G. Evans, Olive Hill, Ky.

Application June 12, 1945, Serial No. 599,074

Our present invention, in its broad aspect, has reference to improvements in shaper attachments for use with a shaper ram for cutting on concave or convex arcs of any desired radius, and more particularly, it is ourpurpose to provide a shaper attachment which is characterized by a wide range of adjustability, and by the simplicity of the mechanical structure, and the fact that there are no concealed and intricate and fragile partslikely to get out of adjustment, or to become deranged, broken or distorted, or otherwise inapt for use. Our lower shaper attachment, which is designed to cut a convex arc of any desired radius is set to be moved into and out of a pit and adjusted in height and is so formed that the interchangeable swivel link connecting unit can be used on either the lower or the upper shaper unit which is designed to cut concave arcs of any desired radius. Furthermore, the tool holder is spring tensioned, and the lower rocker arms are counterbalanced to facilitate reciprocavantages of our invention will be apparent from the following description and drawings, and it is pointed out that changes in form, size, shape, materials, and construction and arrangement of parts is permissible and within the purview of our broad inventive concept, and the scope of the appended claims.

'In the drawings, wherein we have illustrated a preferred form of our invention: 7 Figure 1 is a front vertical elevation; Figure2 is aperspective view of the upper pivot box;

Figure 3 is a vertical elevation taken from the side;

Figure 4 is a vertical section through the swivel link connection of the rocker members and tool holders of the upper or lower shaper units with the shaper ram, and 1 Figure 5 is a section through the pivot box of the lower shaper unit.

In the drawings, wherein like characters of reference are used to designate like or similar parts throughout the several views:

The shaper attachment of this invention-is illustrated as used on a shaper I on a foundation 2 with the shaper provided with a base 3 that is secured to the foundation by bolts 4. The shaper is provided with a ram 5. Pits 6 are provided in the foundation at the sides of the base and stationary supports 1, each having a base 8, are mounted in the pits by bolts 9. Mounted by cap screws ID are guides l l which extend downwardly 4 Claims. 7 (Cl. Bil-24) into the supports 1 and intermediate of the cap screws II] are positioning screws [2. After the guide bars are adjusted in the supports they are secured in position by the set screws l3.

Bearing blocks l4 are slidably mounted on the guide bars l I and these blocks are provided with flanges at the sides between which the guide bars I l are positioned and the blocks are clamped to the guide bars by plates l6 which are held by bolts l l. The blocks 14 are provided with bearing bushings l8 positioned on flat head screws l9 that extend into similar bearing blocks 29 providing a pivotal connection between the blocks. The heads of the screws l 9'are countersunk in the blocks l4 and the block is provided with flanges 2! with plates 23 secured on the outer surfacesof the flanges by ,bolts 22.

The flanges 2d of the block 20 straddle vertically positioned arms 24 and the arms are clamped in the blocks by set screws 25. Similar set screws 25 are also provided in the blocks l4 to retain the blocks in position upon the guides II.

I A transverse bar 26 having a tool carrying bar 38. integral therewith and extended therefrom is mounted between the upper ends of the arms 24 by bolts 21. The lower ends of the guide bars II are provided with counterweights 28 to counterbalance the tool holder and facilitate the operation thereof. 7

The bearing blocks I4 and 29 provide pivotal mounting means for the inverted U-shaped tool carrying frame formed by the arms 24 and bar 26 and set screws 29 which are threaded in .brackets 30 on the upper ends of the guide bars ll prevent swinging movement of the U-shape frame when the frame is not in use. With the U- shape frame pivotally mounted in the bearing blocks l4 and 20 the upper end is reciprocatedv laterally by the ram of the. shaper head for making a convex cut or for working on a convex surface.

A similar smaller U-shape frame having spaced vertically disposed legs 3| is mounted upon and extends upwardly from the shaper and a bearing block 32, which is slidably mounted on the legs 3| is secured in adjusted positions on the legs by screws 33. Trunnions 34 are pivotally mounted in outwardly extended plates 35 of the block 32 and the trunnions extend from a block 36 that is provided with a vertically disposed opening 3'! and set screws 39 in the face of the block secure a tool carrying bar 40, similar to the bar 38, in the block.

The tool carrying bar 40 is provided with a recess 4| in the lower outer corner and a tool holder 42 is mounted on the end of the bar by a pin 43 extended through the tool holder and a tongue in the recess 4|. The tool holder is provided with a set screw 44 by which a cutting tool may be clamped in the holder, as illustrated in Figure 4.

The tool holder 42 is pivotally mounted on the lower end of the bar 40 by the pin 43 whereby the tool is rigidly held in the outward cutting move ment and a spring 45 permits the tool holder to pivot about the pin to permit the tool to swing upwardly above the work in the return movement. The spring is mounted on the upper end of a bolt 6!! which is slidably mounted in a projection 6| on the bar 40, the lower end of the bolt being fastened in a lug 62 on the tool holder 42 and the opposite end being provided with a head 63.

The tool carrying bar 40 is provided with bolts 46 that temporarily mount a block 41 thereon and the block 41 is provided with a socket 48 in which aball 49 of an arm is positioned as shown in Figure 4. The arm 50 is pivotally mounted in a socket 51 by a pin 52, the socket being carried by the outer end'of the shaper ram 5.

With the bar 49 pivotally mounted on the trunnions 34 of the bearing block 32 reciprocation of the shaper ram moves a cutting tool carried by the lower end of the bar whereby the tool cuts in an are on a radius the center of which is on the center of the trunnion 34 whereby a concave surface is machined by the shaper. When it is desired to cut a convex surface the bearing block 32 is moved upwardly on the legs 3 I and the tool holder 42 is removed andattached by a pin 53 similar to the pin 43 to the lower end of the tool carrying bar 38, as shown in Figure' At the same time the block 4'! is removed from the upper bar 40 and attached to the bar 38 whereby upon reciprocation of the shaper ram a tool carried by the tool holder on the lower end of the bar 38 is actuated over a convex surface.

From the foregoing it is believed that the operation and advantages, of our invention will be apparent, but it is again emphasized that interpretation of the scope of. our invention should only be conclusive when made in the light of the subjoined claims.

, We claim: 7 v 1. A swinging attachment for a shaper having a base mounted on a foundation with a shaper ram slidably mounted on the base and having a work table positioned to support work in the path of a tool carried by therram, comprising an inverted U-shaped frame having a transverse horizontally disposed tool carrying bar with downwardly extended rocker arms, a tool, holder carried by the, .bar andpositioned toc'arry a tool over a work table of the shaper, a pair of vertically disposed parallel guide bars mounted in the foundation and between which the said U- shaped frame is positioned, means pivotally mounting the said U-shaped frame through the arms. thereof on the parallel guide,,,bars,,and means connecting the transverse tool holder carrying bar of the U-shaped frameto the shaper ram. I .2. A swinging attachment for a shaper having a base mounted on a foundation with a shaper ram slidably mounted on the base and having a work table positioned to support work in the path of a tool carried by the ram, comprising an inverted U-shaped frame having a transverse means pivotally connecting the transverse tool holder carrying bar of the U-shaped frame to the shaped ram.

3, A swinging attachment for a shaper having a base mounted on a foundation with a shaper ram slidably mounted on the base and having a work table positioned to support work in the path of a tool carried by the ram, comprising an inverted U-shaped frame having a transverse horizontally disposed tool carrying bar with downwardly extended rocker arms, a tool holder carried by the bar and positioned to carry a tool over a work table of the shaper, a pair of vertically disposed parallel guide arms mounted in the foundation and between which the said U- shaped frame is positioned, means pivotally mounting the said U-shaped frame through the arms thereof on the parallel guide bars, means adiusting the position of the pivot of the arms of the U-shaped frame in relation to the guide bars, counterweights on the lower ends of the arms of the said U-shaped frames, and means pivotally connecting the transverse tool holder carrying bar of the U-shaped frame to the shaper ram.

4. In a swinging attachment for a shaper hav-'- ing a base mounted on a foundation with a shaper ram slidably mounted on the base and having a work table positioned to support work in the path of a tool carried by the ram, the combination which comprises an inverted U-shaped frame having a transverse horizontally disposed tool carrying bar with downwardly extended rocker arms, a tool holder carried by the bar and positioned to carry a tool over a work table of the shaper, a pair of vertically disposed parallel guide bars mounted in the foundation and between which the said U-shaped frame is positioned, means pivotally mounting the said Ushaped frame through the arms thereof on the parallel guide bars, an inverted U-shaped support frame mounted on the base of the shaper and extended upwardly therefrom, a tool holder carrying bar pivotally mounted on said support frame and positioned to'carry a tool across the work table, and means pivotally connecting the shaper ram to the tool carrying bar of the support frame or to the transverse tool carrying bar of the U- shaped frame pivotally mounted between the uide bars.

JAMES R. TACKETT. VAL G. EVANS.

/ REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Num er Name Date 843,244 Warner Feb. 5, 1907 1,198,892 Christ Sept. 19, 1916 2,380,446 Joyce et a1 July 31, 1945 

